Machine for marking cylindrical articles



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MACHINE FOR MARKING CYLINDRICAL ARTICLES Filed Feb. 5, 1949 aSheets-Sheet '2 v 0 49 67-- o O o o o o 49 48 3/ 3 8 Sheets-Sheet 3 C.F. ROBBINS MACHINE FOR MARKING CYLINDRICAL ARTICLES am mm mm Jan. 2,1951 Filed Feb. 5. 1949 Iaweaaioa Char ies F7 120222217245, Zqy' Ham! MBTZWMA fliioflneys Jan. 2, 1951 r c. F. ROBBINS I 2,536,985

MACHINE FOR MARKING CYLINDRICAL ARTICLES Filed Feb. 5, 1949 a .8Sheets-Sheet 4 u 12100) H m A a 1 Q 1.. u

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momma: FOR MARKING CYLINDRiCAL ARTICLES Filed Feb. 5, 1949 8Sheets-Sheet 5' 18213921202 CWZG S'EROaZIBW,

Jan. 2, 1951 Filed Feb. 5, 1949 c. F; ROBBINS 2,536,985

MACHINE FOR MARKING CYLINDRICAL ARTICLES" 8 SheetSSheQt 6 I CiaafliesFfloiaizinq 6. F. ROBBINS MACHINE FOR MARKING CYLINDRICAL ARTICLES Jan.2,1951

8 Sheets-Sheet 7 Filed Feb. 5, 1949- Jan. 2, 1951 Filed Feb. 5, 1949 C.F. ROBBINS MACHINE FOR MARKING CYLINDRICAL ARTICLES 8 Sheets-Sheet 8Patented Jan. 2, 1951 PATENT ()FFICE'.

MACHINE ,F.OR"MARKIN,G DYLINDRICAL ARTICLES Charles ;F. Bobbins, :Keene,N. IL, assignor to Markem Machine flompany, Keene, N. .11., :a:corporation .of .New Hainps'hire Application February 5, 1949, SerialNo. 74,845

"ill

Merely for illustrative :purposes freferenee .is I

made to the .vacuum tubes-used in television :sets

as examplesof amarticle which :should "beheld stationary while .animprint is being made there- The machineherein lllustrated includes'achuck element for holding the cylindrical article {120E138 markedstationary during the markin v operation, a type-carrying-element onwhich'is-mountedethe type for making "the imprint circumferentia'llyaround the cylindrical .article, means for :inking the type and meansfor carrying :the inked type bodily about the stationarily iheldcylindrical article for the v ourpose'of .makingon said article thedesired imprint.

In order to ive .an :understanding of the invention, .I have illustratedin the .drawings =-a selected embodiment thereof which wilLnow :bevdescribed, after which .the novel features will the pointedoutintheappendediclaims.

.In the drawings .Eig. 1 .is .a .top plan view -.of-a.marking.machineembodying .my invention.

Fig. 2 is .a frontv end yiew thereof.

Riga-3 .is aside elevation of the .machine with the guard shown insection 100klllg. from .the left in.Fig. 2.

fig. .4 is $3. side elevation .of .the machine .with the guard shown-insectionlcokingifrom.the.right in Fig. 2.

.Eigefi.is.a.sectiononsubstantially.tl1e. line.5- 5, Fig. 1.

Fig. .6 is arsection on substantially .the .line;6--.B,, Fig. .1.

.Eigfll'isa section on substantiallythedine 'l--L'i, 1

Fig.2.

.Eigs. I8, 9, .10, -11 and .12 are .fragmentary views illustratingdifferent positions :of .the parts 1111 ing the operation -.o'f making;an imprint .on .a cylindrical Particle :circum'ferentially .thereo'f.

Eig.. 1'3..is..a.face view of .the drivingrlutchrelement.

Big. 14 ,isasectional viewofthe .gclutch showing the clutch -ipin .inits disengaged .nosition.

2 cylindricalarticle which :has been:marked by the machine.

The'apparatus herein shown is providedwith a stationary chuck element .iby'which :the cylindrical article '2 to be marked is held stationaryduring-the making of theimprint thereon. rSaid chuck=is shown as mountedon a stationary shaft O11r0dc3 which is stationarilyheld-in a'supportingarm *4 with :which the frame 5 of the :machine -.-is provided.JSaidshaft or rod :3 extends through 'thearm' l a-s-shownatt and it hasfast thereon a :collar *1 :which engages-one side of' the arm and hasscrewthreaded thereto anut 8 by which the shaft is rigidly rand -firmlyclamped to the sup- ,porti-ng'arm 4.

Iihe chuck I -wil1rbe constructedsoas to hold firmly and .stationarilythe particular cylindrical article which is .to be marked in themachine.

ceive'the vacuum :tube terminals.

lhe printing element by which the imprint is made on the tubular article'2 .circumferentially thereof is carried by re type-carrying clement .0which-ismounted for rotationabout an axis :parallel .to butespa-ced fromthe .rod-or shaft .3.

In the machine herein illustrated .the printing element is in the formof .a rubber printing pad 1 marrying type characters [2 andsaid :pad vllis.mountedonthe periphery QftheenIarged portion -l3of the .type carrierID. Said type carrier is shown in the form of a cylindrical member whichis .secured to a supporting hub .14 that is mounted for rotationabout ashaft 1 5 which extendslparzallel to the .shaft. 3 but is Y spacedtherefrom. The hub M is preferably mountedon the shaft 15 .by means of:ball bearings 16.

.Theshaft lE-ismountedin a carriage element lL'I which in.turn ismounted for rotation about theistationary shaft ball bearings [8 beingpreferably provided between the carriage I! and the shaft}.

'EIheshaft J5 is rigidly held in thecarriage H, the end 1941f said shaftextending through ;an openin the .carriage and having a collar 2%)thereon which engages one face of the "carriage and :also .having .theclamping nut .2 I thereon by which .the shaft .is securely clamped :tothe carmace.

:Normally the .typeecarrying element I 0 :is sstationary and when atubular article has been plaoedin the chuck, then said type carrier isgivenarotativemovementabout its axialshaft l5 during which the typecharacter I: are inked, and then the carriage I! is given a bodilymovement about the stationary shaft 3, during which bodily movement theinked type characters I2 roll around the periphery of the cylindricalarticle and thereby make the desired imprint thereon.

This operation is illustrated in Figs. 10, 11 and 12 wherein Fig. 10shows the position of the typecarrying element l just after it has beeninked, and Figs. 11 and 12 show it during its planetary bodily movementabout the stationary'cylindrical article 2 during which the printedimpression is made thereon.

For inking the type characters there is provided an inking mechanism 22which includes an ink roll 23 with which the type characters contactwhen the type-carrying element I0 is given its rotary movement about itssupporting shaft I5. The ink roll operates in a reservoir 24 which issupported in proper position on a stationary stud 25 with which theframe is provided. The ink mechanism Z2 may have any suitable ordesirable construction, but I will preferably employ an inking mechanismsuch as is illustrated in United States Patent No. 2,449,909, September21, 1948. In this mechanism the ink roll is positively driven andcontinuously rotated, and for this purpose it is mounted on a shaft 26journaled in the housing 24 and connected by a suitable coupling 21 witha driving shaft 28 that is .iournaled in the machine and is constantlydriven from a motor 29. Said motor 29 is connected by suitable reducinggearing 30 with a power shaft 3| which carries a sprocket wheel 32cooperating with a sprocket chain 33. Said chain 33 passes around asprocket 34 fast on the shaft 28 and also passes around another sprocket35 rotating on a supporting shaft 36 carried by the frame. Said sprocketchain also has engagement with a sprocket 31 forming part of a clutchmechanism to be presently described.

As stated above the type-carrying member I 0 is normally at rest, butwhen the machine is started, it makes one rotation about its axisthereby to ink the type characters l2 and then it moves bodily about theshaft 3 to make the printed impression on the cylindrical article 2, asshown in Figs. 10, 11 and 12.

The means for rotating the type carrier l0 about its axis for inking thetype is actuated from the constantly rotating shaft 28. The hub 4 towhich the type-carrying element I0 is secured has fast therewith a ringor collar member 38 provided with a peripheral friction surface 39 whichis en aged by a collar 40 that is mounted on the shaft 28 for freerotation. Said shaft 28 has fast thereon a companion collar 4| havingthe same size as the free collar 40, and means are provided for couplingthe constantly rotating collar 4| to the free collar 40 for the purposeof giving the type-carrying element IE! its rotation. For this purposethere is provided an arm 42 which is mounted on a shaft 43 carried bythe frame and which carries at its upper end a friction roll 44 that iswide enough to engage both of the collars 4| and 40 simultaneously asshown in Fig. 7.

Normally the arm 42' is in its retracted position shown in Figs. 6 and 8in which the friction roll 44 is out of contact with the collars 40 and4| L Suitable means, such for instance as a treadle, is employed howeverfor moving the arm 42 from its inoperative position shown in Fig. 6 intoits operative position in which the roll 44 contacts with the twocollars 4B and 4|. The treadle, not shown, has a link 45 connectedthereto, the upper end of which extends through an arm 46 mounted on theshaft 43. Said treadle-actuated link 45 has a collar 48 fast thereonwhich engages the arm 4'5 when the treadle is depressed thereby turningsaid arm counterclockwise, Fig. 6. A spring 49 encircling the link 45and situated between the arm 46 and a supporting collar 50 serves toreturn the treadle to normal position when pressure thereon has beenreleased.

The arm 45 is shown as having an extension 5| carrying an adjustable setscrew 52 adapted to engage a shoulder 53 with which the lever 42 isprovided so that when the treadle is depressed and the lever 46 is moveddownwardly the arm 42 will be swung toward the left, Fig. 6, therebybringing the roll 44 into contact with the collars 4|, 42.

54 indicates a spring connecting the arm extension 5| with the arm 42and yieldingly holding the shoulder 53 in engagement with the set screw52.

It will. therefore, be seen that when the treadle is depressed and theroll 44 is moved into engagement with the collars 40 and 4|, therotative movement of the collar 4| which it derives from thecontinuously rotating shaft 28 will be communicated throu h thetransmission roll 44 to the collar 40, and since the collar 40 hasfrictional peripheral engagement with the collar 38 that is rigid withthe type-carrying member ID, said type-carrying member will be given arotative movement about its supporting shaft l5 as an axis. During suchrotative movement the type characters l2 are brought into contact withthe ink roll 23 and are thus properly inked.

After the type carrier NJ has been rotated about its axis sufiicientlyto ink the type, then driving connections are automatically establishedbetween the carriage I! and the sprocket wheel 37 which, it will beremembered, is being constantly rotated from the motor 29 through themedium of the sprocket chain 33, with the result that the carriage I! isturned bodily about the stationary shaft 3, during which operation theinked type is rolled around the cylindrical article 2 and makes an imrint thereon circumferentially thereof. The driving connections betweenthe sprocket 31 and. the carriage l1 include a clutch device 55 whichcompri es a drivin clutch member 56 that is rigid with the sprocket 31and is thus continuou ly in rotation, and a driven clutch member 51 towhich is rigidly secured a sprocket 58 that is con ected by a s rock tchain 59 with a sprocket 60 that is fast to the hub 1| of the carriageI1.

The clutch 55 is of the one revolution ty e and is normallv disen aged,but when thrown into engagement. it will be automatically disengagedagain after it makes one revolution.

Any suitable form of one revolution clutch may be employed forconnecting the sprockets 31 and 58. That herein shown is a clutch of thety e in which the driven clutch member 5'! is provided with a slidingclutch pin 6| that is movable in the direction of the axis of the clutchand which when in operative position engages in a groove or slot 62 withwhich the driving clutch member 56 is provided as Shown in Fig. 13.

The clutch pin 6| is normallv h ld in its backward or retracted positionout of enga ement with the driving clutch m m r 56 as hown in Fig. 14,and means are prov ded wher b when the type-carrying member II] has rotted about its axis sufliciently to ink the type characters l2,

hammers the :clutch spin fBl iWfll be :rreleased and :be :movedzfiorwardly into :its :toperative =position shown in Fig.1! =bym1eans.ofaispringfii rAsasoon as the clutch :is thus engaged, the rotative:movementof the "driving clutch :member 55 will .be

transmitted to the :driven clutch :member 5i rand the sprocket wheel 58,with the result thatithe sprocket 63 will be :given a rotative movementthrough the medium iOf :the sprocket chain :59. :Since the sprocket 6Bis rigid with the hub H of the carriage ll, said carriage will berotated about thetshait .Qaaszaniaxis thereby marrying the .type carrierIi] ibo dily :about :the :article 2 "which .is stationarily held in the-:chuck '1.

.In the construction herein sshown :clu'tch pintl .isiheldin:itsinoperative retractedposition by-aclutch1contr0llingaarm 6t "whichis mounted onsaeshaftfii carried by the ftrame. "lI-he:free cendlfifiiofthis arm-operatesin a grooverfi'l with which the-.dri-venclutchmember 51 is providedzand the clutchpin til is formed :witha notch lei;inrwhich the clutch controlling arm '66 is received when the clutch isatrest and Eis disengaged flSzShQWI'l inl-Fig. 14. 'When the:clutch/isto be engagedthe clutch controlling arm B4 is moved rdownwardly, Fig.'5, to withdraw thexend 66 from themotchtfl in the clutch I pin therebyallowing the spring #63 to throw the clutch pin forwardly into .its :operative vengaged lposition.

=After the .clutch :has-been thus engaged, the clutch-controlling arm-66 "is "allowed toresume its normal position shown in Fig. .5:anduwhenthe clutch completes one rotation, the inclined :f ace 66 :ofthe =clutch-controlling arm 54 engages 'one wall of the-slot-68-andasthe driven clutchim'einbercontinues its rotationsaid inclined face $66has acamming actionaga'in'st the walltof the slot and thus forces the*clutch pin :backwardly against .the action of the spring :63 therebyreleasingiitz from the groove 62 oftheidriving'clut'ch member.

For thus automatically throwing the iclutch into engagement when thetype carrier Ii! .has rotated :sufiiciently to ink the type, .I :have:pro-

vided the following mechanism. Theshaft'efi on which theclutch-controlling arm 1% is :mounted has mounted thereon and rigidtherewith alatch arm M which is provided at its .free end withan openingthrough which the :upper end it :of the treadle .linktfi extends. Thislatch arm I4 .is provided .with acatch l-.8 thatcooperateswitha springpressedlatch t1 that is pivotallytmounted at 18. The latch 17 isyieldingly held :in its-operative position in engagement with the catchJ16 by means of a spring .19.

The latch .11 is ,provided with an upper .extem sionflil whichissituated vin .a position to be engaged by a trip pint8' I'thatis-carriedibythe friction collar-88. The friction collar 33is.rotatedin the .direotionlof the arrowFig. 6, andtheengagemerit of thetrip pin with the upper endlfiii of the latch will swing the .latchclockwise in Fig .6 thereby ireleasing it "from the catch 1.6. Filheupper end of 'the'treadlelink is encircled by.a spring 82 whichi'sconfined between their-ee end ofthelatch arm 'Mand a collar or nutISEcarried :at the upper extremity "of the link 55.

When the "treadle "is depressed initially to throw the transmission'rollream operative engagement with-thecollars 4'0 "and H for the .purposeo'fsetting thetype carrier 1 ll in'rotatiomthe latch arm 1 l-is locked'from downward movement by the catch 11 and hence the spring 82 "will becompressed by such :downward movement of the link '45.

6v isoonzas the latch 7W iszreleasedifromrthe "catch .15 rby theengagement :of the trippin :8] WithTflIB-UIJDEI end til of saidlatch,';the2expandingestion of the compressed 'spring182 will move thelatch farm "M :downwardly "thereby turning the shaft :in -.acounterclockwise direction :and

swinging the clutch-controlling :arm 64 :downwardly into its inoperativeposition, "with theresult 'th at the clutch will "be thrown :intoengagement.

When this 1 occurs the operator "will release the trea'dle and thereturnspring 49 will raise the arm at .to-disengage thetransmission-roll 'Mrfrom the'co11a1's'4fl and llsand'a collared on'thetreadle link 55 will engage the latch arm i4 and raise it intoits'normal position'showninFig. 6,'in which position the :catch "16 willbe automatically "engaged'by the spring pressed latch TE.

a tubular extension '96 which :encir'cles andhas bearing on thestationary shaft 3,and said extension is provided with'a forked arm 9!which embraces the supporting 'hub M for the typecarrying member H].Hence when the hub H is turned'bythe sprocket chain 59 thereby to givethe type-carrying member its planetary movement about'the cylindricalarticle to beprinted, the engagement of the forked arm 9| with the hubI4 will rotate the hood fifiabout'the shaft 3 thusmaintaining properregisterbetween the portion 13 of the type-carryingmember it and theaperture 36 in the hood.

In order to make a .proper'prin'ted impression on :the cylindricalarticle 2,means are provided so that as the'type carrier is makingitsplanetary movement about the shaft 3, the said type carrier will be alsogiven a rotation on its own axis'with the result that the type plate llwill -have a "rolling contact with the stationary cylindrical article 2during the planetary movement of the rotatable, said collar 8? havingthe same diame-- however, and the carriage ll starts-on itsrotative'movement to carry the type-carrying memher it! through itsplanetary journey about the shaft 3, the frictional surface of thecollar 38 moves out of the notch or depression 96 and comes intofrictional engagement with the stationary collar 8?, which asstatedabovalhas the same diameter as the cylindrical article "2. Thecollar 38 also has the same cylindrical diameter "as theportion'of thetype carrying'element I l) on which the type pad H is mounted. Hence assoon as the carriage I I with the type-carrying element l thereon startsits rotative movement about the shaft 3, the frictional contact of thecollar 38 with the fixed collar 81 will cause said collar 38 to have arolling engagement with the fixed collar 81 during the planetary motionabout the shaft 3 thereby turning said collar and the type-carryingelement [0 about the shaft l5 during such planetary motion. This resultsin the type characters l2 having a rolling contact with the stationarycylindrical article 2 by which the desired imprint is made on saidcylindrical article.

The sequence of operations of the machine are shown more or lessdiagrammatically in Figs. 8 to 12.

Fig. 8 shows the machine at rest with the clutch 55 disengaged and withthe transmission roll 44 out of engagement with the collars 4B and 4|and with the treadle link 45 in raised position.

When the treadle is depressed the transmission roll 44 is swungforwardly into engagement with the collars 4! and 4| as shown in Fig. 9and by this means the rotative movement of the continuously rotatingshaft 28 is conveyed to the collar 40, which by its frictionalengagement with the collar 38 will give rotative movement to thetypecarrying element if] for inking the type I2.

By the time that the type characters are properly inked, the trip pin 8|comes into engagement with the upper end of the trip lever ll as shownin Fig. 10, thereby releasing the latch arm 54 so that the compressedspring 82 will move said arm downwardly from the position shown in Fig.9 to that shown in Fig. 10. This movement of the arm 14 operates throughthe shaft 55 to swing the clutch-controlling arm 64 downwardly from itsoperative position shown in Fig. 9 to its inoperative position shown inFig. 10, thereby releasing the clutch pin 6i with the result that theclutch 55 will be engaged.

The engagement of the clutch 55 operates through the sprocket wheels 58and 66 and sprocket chain 59 to rotate the carriage I? about the shaft 3as shown in Figs. 11 and 12, and during this rotative movement thetype-carrying element I0 is given a rotation about its own axis by theengagement of the collar 38 with the stationary collar 81 so that thetype plate I i will have a rolling engagement with the cylindricalarticle 2 during the planetary journey of said type carrier about thearticle and thereby an imprint will be made on the article extendingcircumferentially thereof. As stated above the operator will release thetreadle as soon as the type carrier It! starts its planetary movementand as a result, the machine will come to rest after the clutch has madeone revolution with the parts in the position shown in Fig. 6.

I claim:

1. A machine for marking cylindrical articles comprising a stationarychuck for holding station ary the cylindrical article to be marked, atypecarrying member, type carried thereby, means to give saidtype-carrying member a rotative movement about a stationary axisparallel to but spaced from the axis of the chuck, means to ink the typeduring such rotative movement, and means operative after the type hasbeen inked to give the type-carrying member with its inked type aplanetary movement about the stationarily held cylindrical article withthe type in contact therewith, thereby to make a printed impressionthereon.

2. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary the cylindrical article to be marked, acylindrical type-carrying member having type on its periphery, meanssupporting said type-carrying member to rotate about a stationary axisparallel to but spaced from the axis of the chuck, means to ink the typeduring such rotation, and means operative after the type has been inkedto give the type-carrying member a planetary movement around thestationarily held cylindrical article, thereby to make a printedimpression thereon.

3. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary the cylindrical article to be marked, acylindrical type-carrying member having type on its periphery, meanssupporting said typecarrying member to rotate about an axis parallel tobut spaced from the axis of the chuck, means to ink the type during suchrotation, and means rendered operative by the rotative movement of thetype-carrying member about its axis after the type has been inked togive said member a planetary movement about a cylindrical article heldstationary in said chuck, thereby to make a printed impression on saidarticle.

4. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary a cylindrical article to be marked, atypecarrying member having a cylindrical type-carrying surface, the axisof which surface is parallel to but spaced from that of a cylindricalarticle held in the chuck, a printing element carried on saidcylindrical surface, means to turn said type-carrying member about itsaxis, means maintaining said axis stationary during such turningmovement, means for inking the printing element while it is turningabout its stationary axis, and means to give the type-carrying memberwith its inked printing element a planetary movement about a cylindricalarticle held in the chuck, thereby to make a printed impression thereon.

5. A machine for marking cylindrical articles r comprising a stationarychuck for holding stationary a cylindrical article to be marked, acarriage mounted for rotative movement about the axis of a cylindricalarticle held in said chuck, a printing element mounted on said carriagefor rotation about an axis parallel to but spaced from that of saidcylindrical article, means to turn said printing element about its axiswhile the carriage is stationary, means to ink said printing elementduring such turning movement, and means operative after the printingelement has been inked to give said carriage a rotary motion about itsaxis and thereby give the printing element a planetary motion about thecylindrical article by which a printed impression is made thereon.

6. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary a cylindrical article to be marked, acarriage mounted for rotative movement about the axis of a cylindricalarticle held in said chuck, a printing element mounted on said carriagefor rotation about an axis parallel to but spaced from that of saidcylindrical article, means to turn said printing element about its axiswhile the carriage is stationary, means to ink said printing elementduring such turning movement, meansrendered operative by the turningmovement of the printing'element after the latter has been inked to givesaid carriage a rotary motion about its axis and thereby give the inkedprinting el ment a planetary motion about the stationary cylindricalarticle.

'7. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary the cylindrical article to be marked, atyne-carrying member, tyne carried thereby, means to give thetype-carrying member a turnhis movement about a'stationary axis, meansto ink the tyne during such turning movement, means operative after thetype is inked to give said type-carryin member a planetary movementabout a cylindrical article held in said chu k ith the ty e in contactwith said article, and means to rotat the tvne-carrving member about itsown axis during such planetary motion, wh reby the ty e will have arolling contact with the cyli drical article.

8. A machine for marking cylindrical articles com ris n means forholding stat onary a cvlindr c l article to be marked. a c lindricaltypecarrving memb r. tvne carried therebv. means to give the tye-carryin member a turnin movement abo t its axis, m ans maintainingsaid axi stationar durin such turning mov m nt, means to ink the t pe asthe t ne-carryin memb r turns. me ns r ndered o e ative by said turninmov ment of the tvpe carrving member to gi the latter a pl n tarymovement about said statio aril h ld c lin rical article and with the tpe in contact with said cyl ndrical article, and ur a he to rotate th tpe-carrying member about its own axis du i such p etary motion, wb rc te t w l have a rolling contact with the c l ndrical article 9 A machine"or markin c lindrical articles co ri in a stationary chuck for holdingstati a c l ndr cal art cle to be marked. a cyl al t ne-c rr in m m ermounted for rotqfinfi about an axi parallel to t Spaced from that. a, cli drical article held in said chuck, me to i e. t e t loemarrvin mem era turni m e nt a out a stat on ry axis, means to i k aid m er duri uchturning movement, mean incl ding a clutch. for iving the typecarv-vinmem er wi h it inked t pe a planetary mot n around a c lindrical articleheld in said ch k w h. the type in contact with the cylindri l article.and clutch-controlling means rend r d op r e y he turning mo ement ofthe t n arrying member during which the type is inked.

10. A machine for marking cylindrical articles com ri ing a stationarychuck for holding statio ary a c lindrical article to be marked. a normll stationary carria e mounted for turning move ent about the axis of acylindrical article held in. said chuck. a printing element mounted onsaid carria e for rotation about an axis parallel to but aced from. t eaxis of the chuck,

means to give t e printing element a partial turning movement about itsaxis while the carria e is stationary, an ink roll for inking theprinting element during such partial turning movement. and meansrendered operative after the printing element has been inked to rotatethe carriage about its axis thereby giving the inked printing element aplanetary motion about a cylindrical article held in said chuck.-

11. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary a cylindrical article to be marked, anormally stationary carriage mounted for turning movement about the axisof a cylindrical arti .e held in said chuck, a printing element mountedon said carriage for rotation about an axis parallel to but spaced fromthe axis of the chuck, means to give the printing element a partialturning movement about its axis while the carriage is stationary, an inkroll for inking the printing element during such partial turningmovement, and means rendered operative after the printing element hasbeen inked to rotate the carriage about its axis thereby giving theinked printing element a planetary motion about a cylindrical articleheld in said chuck, and means to rotate the printing element about itsaxis during such planetary motion whereby it will have a rolling contactwith the cylindrical article.

12. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary a cylindrical article to be marked. anormally stationary carriage mounted for turning movement about the axisof a cylindrical article held in said chuck, a printing element mountedon said carriage for rotation about an axis parallel to but spaced fromthe axis of the chuck, means to give the printing element a partialturning mo ement about its axis While the carriage is stationary, an inkroll for inking the printing element during such partial turningmovement, means including a clutch to rotate the carriage about its axisthereby to give the printing element a planetary motion about thecylindrical article. and means to render the clutch operative by saidpartial turning movement of the printing element.

13. A machine for marking cylindrical articles comprising a stationarychuck for holding stationary a cylindrical article to be marked, anormally stationary carriage mounted for turning movement about the axisof a cylindrical article held in said chuck, a printing element mountedon said carriage for rotation about an axis parallel to but spaced fromthe axis of the chuck, means to give the printing element a partialturning movement about its axis while the carriage is stationary, an inkroll for inking the printing element during such partial turningmovement, means including a clutch to rotate the carriage about its aXisthereby to give the printing element a planetary motion about thecylindrical article, and means to render the clutch operative by saidpartial turning movement of the printing element, and means to rotatethe printing element about its own axis during such planetary motionwhereby it will have a rolling contact with the cylindrical article.

CHARLES F. ROBBINS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 425,807 Leach 1 Apr. 15, 18901,724,749 Conant Aug. 13, 1929 1,914,035 Moeschlin June 13, 19332,449,909 Putnam et al Sept. 21, 1948

